What is the principle and characteristics of anti counterfeiting printing ink and anti counterfeiting printing ink?
Pressure-sensitive anti-counterfeiting ink: in the ink to participate in the color change substances microcapsules and corresponding chemical reagents. With this ink printing graphics and text are visible and can not see, when nails or hard objects pressing, that is, attack color changes, according to planning can show red, blue, black, green, purple, yellow and other colors. The color is no longer restored, indicating that the logo is enabled and that the product has been sold
Thermal anti-counterfeiting ink: in heating, lead to ink added liquid crystal or thermochromic compound, attack chemical structure change and change color. After changing color, some can invert; some can not invert. The temperature is usually between 40 and 100 degrees centigrade. When you check, you can use your finger or cigarette butt and hot water cup to heat it up.
Infrared anti-counterfeiting ink: the absorption of infrared material to participate in the ink made. Because infrared ink absorbs infrared rays, as in some part of the printing ink, the ink has no response in sunlight, but under the infrared light, the corresponding signal or dark picture can be investigated.
Sunlight causes discoloration ink: under the sunlight shining, can announce the visible light (400 ~ 800nm) the anti-counterfeit printing ink.
UV fluorescent ink: ink according to have their own colors and divided into colored fluorescent ink and colorless fluorescent ink two, the print text visible to the naked eye, the latter is not seen, but the two are required in the ultraviolet light below can show.Light. Because ultraviolet light has long wave and short wave, so fluorescent ink is different, and now use long wave ultraviolet ink more. The manufacturing skills of fluorescent inks have harsh requests, and some low-quality fluorescent inks are cheaper in the inkCompetition on the market, anti-counterfeiting function is very poor, usually tarnished the reputation of fluorescent ink, in the purchase should pay attention to.
